[Physical and biophysical aspects of high-energy intracardiac electric discharges. III. Correlation between physical and electric effects for the use of supraliminal shocks].
Using the same methods as for the measurement of electrical parameters by means of an oscilloscope with a wave shape calculator to determine at all points the energy and impedance values, as well as high speed cinematography, the analysis of the behavior of these parameters for shocks with energies close to those used in clinical medicine can be carried out. It shows namely an important decrease in the impedance at the current peak due to an important ionization of the fulguration bubble. It underlines the different behavior of the anode and cathode bubbles, in relation with the size of the bubbles obtained thanks to rapid cinematography. Comparative measurements concerning the polarity, the size of the indifferent electrode, the medium used in vitro and in vivo have supplied the elements to enable the precise determination of the adequate electrical parameters for the good use of fulguration.
Fontaine
G
G
Service de Rythmologie et de Stimulation Cardiaque, Hôpital Jean Rostand, Ivry.
Aldakar
M
M
Iwa
T
T
Grosgogeat
Y
Y
D000818:Animals; D055592:Biophysical Phenomena; D001703:Biophysics; D004558:Electric Stimulation; D006321:Heart; D006801:Humans; D055585:Physical Phenomena; D010825:Physics
Aspects physiques et biophysiques des décharges électriques intracardiaques à haute énergie. III. Corrélation entre les effets physiques et électriques pour des chocs supraliminaires.